Hello and Welcome to Ask A Doctor service. I have reviewed your query and here is my advice. Your symptoms of chapped lips which peels and become white is pointing towards a condition known as exfoliative chelitis. Exfoliative chelitis is a condition in which there is continuous peeling of the lips leading to appearance of dry, damaged and flaky lips. It commonly occurs due to habit like lip biting, lip licking, lip sucking etc. Other causes can be mouth breathing, bacterial and fungal infections. You can use Mometasone cream but first of all a confirmation of diagnosis is must. As you are not confirmed that you have exfoliative chelitis or not you should consult a Dermatologist and get evaluated and he can do a clinical evaluation and investigations like microscopic examination of scraping from the lips can help in diagnosis. In case of exfoliative chelitis you can be advised to apply a thick coat of Petroleum jelly over the lips. You can also apply beeswax containing lip balm frequently throughout the day. You can also apply Tacrolimus and Marigold containing ointments. You should avoid licking, sucking or biting the lips. Drink plenty of water. In case of bacterial or fungal infection, antibiotics or anti fungal medicines can be given accordingly. For mucocele do concentrated salt water rinses and if it doesn t regress then it has to be removed surgically. Hope I have answered your query. Let me know if I can assist you further.